package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.vo.OrderReportVO;
import com.sky.vo.SalesTop10ReportVO;
import com.sky.vo.TurnoverReportVO;
import com.sky.vo.UserReportVO;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @Author:ZouChou
 * @Description:
 * @Date:Created in 16:19 2024/5/5
 * @Modified By:
 */
@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //封装返回结果
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        //循环日期列表，计算每个日期的营业额
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate data : dateList) {
            //获取一天的开始
            LocalDateTime beginTime = LocalDateTime.of(data, LocalTime.MIN);
            //获取一天的结束
            LocalDateTime endTime = LocalDateTime.of(data, LocalTime.MAX);

            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double sum =orderMapper.sumByMap(map);
            turnoverList.add(sum == null ? 0.0 : sum);


        }
        

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();





    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        //封装返回结果
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        //循环日期列表，计算每个日期的营业额
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }


        // 存放新增用户数量 select count(id) from user where create_time > beginTime and create_time < endTime
        List<Integer> newUserList = new ArrayList<>();
        // 存放总用户数量 select count(id) from user where create_time < endTime
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate data : dateList) {
            //获取一天的开始
            LocalDateTime beginTime = LocalDateTime.of(data, LocalTime.MIN);
            //获取一天的结束
            LocalDateTime endTime = LocalDateTime.of(data, LocalTime.MAX);

            Map map = new HashMap<>();
            map.put("end",endTime);
            //总用户
            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            //新增用户
            map.put("begin", beginTime);

            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);





        }


        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            // 日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 存放每天的订单总数
        List<Integer> orderCountList = new ArrayList<>();
        // 存放每天的有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();
        // 查询每天的有效订单数，和订单总数
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

            // 查询每天的订单总数 select count(id) form orders where order_time > beginTime and order_time < endTime
            Integer orderCount = getOrderCount(beginTime, endTime, null);

            // 查询每天的有效订单数 select count(id) form orders where order_time > beginTime and order_time < endTime and Status = 5
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        // 计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();

        // 计算区时间间内的有效订单数
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        // 计算订单完成率
        Double OrderCompletionRate = 0.0;
        if (totalOrderCount != 0){
            OrderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(OrderCompletionRate)
                .build();
    }



    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status){
        Map map = new HashMap<>();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);

        return orderMapper.countByMap(map);
    }

    /**
     * 销量排名top10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }


}
